Effect of the addition of bagasse and imported long fiber chemical pulps on the properties of chemical-mechanical pulp produced from hornbeam, beech and poplar mixture

The aim of this study is to investigate the properties of pulp produced by the admixture of wood and non-wood fibers. The mixture of hardwoods chemical-mechanical pulp (60% hornbeam, 20% beech and 20% poplar) of Mazandaran factory with bagasse industrial pulp of Pars factory (non-wood fibers) with ratios of 65 to 20, 55 to 30, 45 to 40, 35 to 50, 15 to 70, respectively were used. Every mixture of pulps was reinforced with 15 percent of the imported long fiber bleached softwood kraft pulp. Pulp properties such as fiber length, ash percent and freeness were determined. Hand-sheets were made and the properties such as brightness, porosity, tensile and burst indices, breaking length, and tear index were measured. The results of the length distribution of fibers showed that the CMP of Mazandaran wood and paper factory has a better quality than the bagasse chemical pulp of Pars Company. The statistical analysis of the results showed that the properties of hand-sheets such as burst index, tear index and brightness decrease with increasing the amount of bagasse pulp, except for the tensile index, which has not changed significantly. Also, with increasing the amount of bagasse pulp, the porosity property was decreased.